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时间:2019-07-31
《Self-healing property of concrete – experimental evidence.》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、MaterialsandStructures/Mat6riauxetConstructions,Vol.30,August-September1997,pp404-411Self-sealingpropertyofconcreteExperimentalevidenceNatalyaHearn1,C.T.Morley2(I)AssistantProfessor,DepartmentofCivilEngineering,UniversityofToronto,Toronto,Ontario,CanadaM
2、5S1A4(2)SeniorLecturer,DepartmentofCivilEngineering,UniversityofCambridge,TrumpingtonStreet,EnglandCB2IPZPaperreceived:January24,1996;Paperaccepted:March21,1996ABSTRACIRESUMF:Leak-@tnessofconcreteisoftenjudgedintermsofOnpeutsouventdvaluerl'6tanchditdd'un
3、bdtonselontheD'Arcycoefficientdeterminedbytheflowofwaterlecoefficientd'Arcy,quiestddtermindparlepassagedethroughsaturatedconcreteataconstantrate.Inthecaseofl'eauatraversunbdtonsaturd27untauxconstant.Ceflowthroughsaturatedconcrete,thisrateoftenreducestaux
4、diminuegraduellementetpeutmettreuncertainwithtimeandreachingaconstantvaluemaytakemanyhombredejoursavantd'atteindreunevaleurconstant5、untforthisbehaviour.Thececomportement.Lesrdsultatsconfirmentqueladissolu-resultsobtainedsupporttheconceptthatthedissolutiontionetlared@ositiondesalcalinsconstituelemdcanismeleandre&positionofalkalisisthemostsignificantmecha-plusimportantclansladiminution6、graduelledupassagedenisminthetime-dependentreductionofflowofwaterinl'eauatraversunbdtonsaturd.Lapermdabitit6d'unbdtonsaturatedconcrete.Permeabilityofsaturatedconcreteandsatur6etsacapacit6adevenir6tanchepeuvent&reutilis&sself-sealingmaybeusedasmeasuresoft7、he"immune"sys-commemesuredeson((syst~meimmunitaiw~)etdesontemsandpotentialdurabilityofdifferentconcretes.potentieldedurabilit(.>iiiiiiiill1.INTRODUCTIONever,hasshowedcontrarybehaviourinthatflowvariesduringpermeabilitytests.ConstantflowwasobtainedThemeasu8、rementofsaturatedpermeabilityofconcreteonlyunderspecialconditions,suchasinwell-cured,haspresentedsomeexperimentaldifficulties,butmorenever-dried[3,4]orleached[5]specimens.Themostsig-importantly,thedifficultyhasbeenintheuse
5、untforthisbehaviour.Thececomportement.Lesrdsultatsconfirmentqueladissolu-resultsobtainedsupporttheconceptthatthedissolutiontionetlared@ositiondesalcalinsconstituelemdcanismeleandre&positionofalkalisisthemostsignificantmecha-plusimportantclansladiminution
6、graduelledupassagedenisminthetime-dependentreductionofflowofwaterinl'eauatraversunbdtonsaturd.Lapermdabitit6d'unbdtonsaturatedconcrete.Permeabilityofsaturatedconcreteandsatur6etsacapacit6adevenir6tanchepeuvent&reutilis&sself-sealingmaybeusedasmeasuresoft
7、he"immune"sys-commemesuredeson((syst~meimmunitaiw~)etdesontemsandpotentialdurabilityofdifferentconcretes.potentieldedurabilit(.>iiiiiiiill1.INTRODUCTIONever,hasshowedcontrarybehaviourinthatflowvariesduringpermeabilitytests.ConstantflowwasobtainedThemeasu
8、rementofsaturatedpermeabilityofconcreteonlyunderspecialconditions,suchasinwell-cured,haspresentedsomeexperimentaldifficulties,butmorenever-dried[3,4]orleached[5]specimens.Themostsig-importantly,thedifficultyhasbeenintheuse
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